US20170050245A1 - Expanding locating pin with controlled holding force - Google Patents
Expanding locating pin with controlled holding force Download PDFInfo
- Publication number
- US20170050245A1 US20170050245A1 US14/830,287 US201514830287A US2017050245A1 US 20170050245 A1 US20170050245 A1 US 20170050245A1 US 201514830287 A US201514830287 A US 201514830287A US 2017050245 A1 US2017050245 A1 US 2017050245A1
- Authority
- US
- United States
- Prior art keywords
- locating pin
- jaws
- expanding
- assembly
- actuating mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/1612—Jaws movement actuated by cam surface in a radial plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/08—Work-clamping means other than mechanically-actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B31/00—Hand tools for applying fasteners
- B25B31/005—Hand tools for applying fasteners for temporarily connecting sheets before or during assembly operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/06—Arrangements for positively actuating jaws
- B25B5/08—Arrangements for positively actuating jaws using cams
- B25B5/087—Arrangements for positively actuating jaws using cams actuated by a hydraulic or pneumatic piston
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J15/00—Gripping heads and other end effectors
- B25J15/009—Gripping heads and other end effectors with pins for accurately positioning the object on the gripping head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
- B23B31/1253—Jaws movement actuated by an axially movable member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J15/00—Gripping heads and other end effectors
- B25J15/08—Gripping heads and other end effectors having finger members
- B25J15/10—Gripping heads and other end effectors having finger members with three or more finger members
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/0282—Positioning or locking of single discs of discs rotating during transducing operation by means provided on the turntable
Definitions
- This disclosure relates to an expanding locating pin with controlled holding force.
- a manufacturing system typically operates on parts, subassemblies, and/or assemblies that must be accurately located and held in place for manufacturing and assembly operations.
- a sheet metal part, subassembly, or assembly may need to be accurately located and held in place to conduct assembly, welding, and inspection operations in the body shop of a vehicle assembly plant.
- Part locating fixtures are normally used for this purpose.
- Part locating fixtures typically include a plurality of fixed pins that are configured to fit into a plurality of locating holes in the part and one or more clamps that are configured hold the part in place.
- the locating holes may have various sizes and/or shapes.
- Part locating fixtures are generally useable for only one particular part size and/or shape and usually need to be modified or rebuilt to locate and hold a differently sized and/or shaped part.
- Multiple part locating fixtures are typically required for the wide variety of parts and the wide variety of assembly and manufacturing operations in a manufacturing plant.
- the expanding locating pin assembly is configured to locate a part with locating holes of various sizes.
- the expanding locating pin assembly includes a housing, a locating pin, an actuating mechanism, and a controller.
- the housing is configured with a plurality of radial jaw guides and a part rest face.
- the locating pin has a plurality of jaws. Each jaw is connected to and radially movable in one of the radial jaw guides and extends from the part rest face.
- the actuating mechanism is connected to the housing and the jaws and is configured to synchronously move the jaws to a radial position.
- the controller is connected to the actuating mechanism and is configured to control the radial position of the jaws.
- the part rest face of the housing and the jaws of the locating pin are configured to receive the part in a located position.
- the housing may be configured with three jaw guides, and the locating pin may have three jaws.
- a second embodiment of the expanding locating pin assembly is configured to locate a part with locating holes of various sizes and hold the part with a controlled holding force.
- the expanding locating pin assembly includes a housing, a locating pin, an actuating mechanism, and a controller.
- the housing is configured with a plurality of radial jaw guides and a part rest face.
- the locating pin has a plurality of jaws. Each jaw is connected to and radially movable in one of the radial jaw guides and extends from the part rest face.
- the actuating mechanism is connected to the housing and the jaws and is configured to synchronously move the jaws to a radial position and to apply the holding force to the part.
- the controller is connected to the actuating mechanism and is configured to control the radial position of the jaws and the holding force of the jaws on the part.
- the part rest face of the housing and the jaws of the locating pin are configured to receive the part in a located position.
- the jaws of the locating pin are configured to hold the part in the located position via the holding force and a friction force resulting from the holding force.
- the housing may be configured with three jaw guides, and the locating pin may have three jaws.
- the flexible manufacturing system is configured for manufacturing one or more of a part, a subassembly, and an assembly each having various configurations and locating holes of various sizes.
- the flexible manufacturing system includes an expanding locating pin assembly configured to locate and hold one of the part, the subassembly, and the assembly in a located position.
- the expanding locating pin assembly includes a housing, a locating pin, an actuating mechanism, and a controller.
- the housing is configured with a plurality of radial jaw guides and a part rest face.
- the locating pin has a plurality of jaws. Each jaw is connected to and radially movable in one of the radial jaw guides and extends from the part rest face.
- the actuating mechanism is connected to the housing and the jaws and is configured to synchronously move the jaws to a radial position and to apply the holding force to the one of the part, the subassembly, and the assembly.
- the controller is connected to the actuating mechanism and is configured to control the radial position of the jaws and the holding force of the jaws.
- the part rest face and the jaws of the locating pin are configured to receive the one of the part, the subassembly, and the assembly in the located position.
- the jaws of the locating pin are configured to hold the one of the part, the subassembly, and the assembly in the located position via the holding force and a friction force resulting from the holding force.
- the housing may be configured with three jaw guides, and the locating pin may have three jaws.
- the expanding locating pin assembly and the flexible manufacturing system enable parts, subassemblies, and/or assemblies having various configurations and locating holes of various sizes to be located and held in place for manufacturing and assembly operations.
- This disclosure applies to any machine or manufacture that locates any item, including but not limited to parts, subassemblies, assemblies, for any purpose.
- This disclosure applies to any manufacturing system, including but not limited to manufacturing systems for vehicles and other transportation products, industrial products, construction products, consumer products, and government products.
- FIG. 1A is a schematic perspective illustration of an expanding locating pin assembly with a plurality of jaws at a minimum diameter radial position.
- FIG. 1B is a schematic perspective illustration of the expanding locating pin assembly of FIG. 1A including a part that is located and held in a located position by the expanding locating pin assembly.
- FIG. 2 is a schematic side view of the expanding locating pin assembly of FIG. 1A with the plurality of jaws at the minimum diameter radial position and including the part to be located and held.
- FIG. 3A is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly of FIG. 1A , taken at line 3 - 3 of FIG. 2 , with the plurality of jaws at the minimum diameter radial position.
- FIG. 3B is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly of FIG. 1A , taken at line 3 - 3 of FIG. 2 , with the plurality of jaws at a maximum diameter radial position.
- FIG. 4A is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly of FIG. 1A , taken at line 4 - 4 of FIG. 2 , with the plurality of jaws at the minimum diameter radial position.
- FIG. 4B is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly of FIG. 1A , taken at line 4 - 4 of FIG. 2 , with the plurality of jaws at the maximum diameter radial position.
- FIG. 5 is a fragmentary schematic perspective view illustration of the expanding locating pin assembly of FIG. 1A with an upper portion of a housing removed for clarity.
- FIG. 6 is schematic perspective view of an alternative embodiment of the expanding locating pin assembly of FIG. 1A .
- FIG. 1A-1B shows an expanding locating pin assembly 10 for use in a flexible manufacturing system (not shown).
- the flexible manufacturing system is configured for manufacturing and/or assembling one or more of a part, subassembly, or assembly 12 each having various size and shape configurations and each configured with one or more locating holes 14 of various sizes.
- the locating holes 14 have an edge 18 .
- the part, subassembly, or assembly 12 has a locating surface 15 .
- the part 12 may need to be accurately located and held in place for manufacturing and assembly operations.
- a sheet metal part, subassembly, or assembly 12 may need to be accurately located and held in place to conduct assembly, welding, and inspection operations in the body shop of a vehicle assembly plant.
- the expanding locating pin assembly 10 is configured to locate the part 12 via the locating hole 14 and the locating surface 15 in a located position 16 .
- the expanding locating pin assembly may also be configured to hold the part 12 with a controlled holding force (arrow HF) in the located position 16 .
- Locating is defined herein as positioning the part 12 in the located position 16 in 3-dimensional space.
- Holding is defined herein as retaining the part 12 in the located position 16 via the holding force (arrow HF) acting normal to and on the edge 18 of the locating hole 14 and/or via a friction force (arrow FF) resulting from the holding force (arrow HF) and acting parallel to and on the edge 18 of the locating hole 14 .
- Holding does not include clamping.
- Clamping is defined herein as compressing the part 12 between two surfaces with a clamping force (not shown) such that movement of the part 12 is prevented by the clamping force and by the interference of the two surfaces with the part 12 .
- the expanding locating pin assembly 10 may be connected to an immovable structure (not shown), or to a moveable device (not shown), including but not limited to a robot, a conveyor, or a guided vehicle. There may be multiple expanding locating pin assemblies 10 included in the flexible manufacturing system and/or in a particular manufacturing or assembly operation in the flexible manufacturing system.
- the expanding locating pin assembly 10 includes a housing 20 , a locating pin 22 , an actuating mechanism 24 , and a controller 26 .
- the housing 20 is configured with a plurality of radial jaw guides 28 and a part rest face 30 .
- the locating pin 22 has a plurality of jaws 32 .
- Each jaw 32 is connected to and radially movable in one of the radial jaw guides 28 and extends out of the housing 20 past the rest face 30 .
- the locating pin 22 has a locating pin axis (axis LP) at its center of symmetry.
- Each of the jaws 32 has a part holding feature 33 at the radially outer edge of the jaw 32 that is farthest from the locating pin axis (axis LP).
- the part holding feature 33 of the jaws 32 may be a surface that is parallel to the locating pin axis (axis LP), as shown.
- the part holding feature 33 of the jaws 32 may be a segment of a cylindrical surface, as shown.
- the part holding feature 33 of the jaws 32 may be any other suitable feature for applying the holding force (arrow HF) perpendicular to the surface of the edge 18 of the locating hole 14 .
- the housing 20 may be configured with three radial jaw guides 28 and the locating pin 22 may have three jaws 32 for locating the part 12 when the locating hole 14 is a round hole, as shown.
- the housing 20 may be configured with two radial jaw guides 28 and the locating pin 22 may have two jaws 32 for locating the part 12 when the locating hole 14 is a slot (not shown).
- the actuating mechanism 24 is connected to the housing 20 and the jaws 32 .
- the actuating mechanism 24 is configured to synchronously move the jaws 32 to a radial position 34 defining a locating pin circumference 31 and a locating pin diameter 35 and to cause the jaws 32 to apply the holding force (arrow HF) normal to the surface of the edge 18 of the locating hole 14 of the part 12 .
- Radial is defined herein as the direction perpendicular to the locating pin axis (axis LP).
- the actuating mechanism includes an actuator 25 .
- the actuator 25 may be one of a pneumatic actuator, a hydraulic actuator, and an electric servo motor.
- the controller 26 is connected to the actuating mechanism 24 and is configured to control the motion and the radial position 34 of the jaws 32 and to control the holding force (arrow HF) of the jaws 32 on the edge 18 of the locating hole 14 of the part 12 .
- the magnitude of the holding force (arrow HF) may be controlled as appropriate depending on a variety of factors, including but not limited to the material type, the material thickness, the size, and the shape of the part 12 .
- the part 12 is located in the located position 16 on the part rest face 30 and the jaws 32 of the locating pin 22 .
- the locating surface 15 of the part 12 is in contact with the part rest face 30 of the housing 20 when the part 12 is in the located position 16 .
- the part holding features 33 of the jaws 32 are in close proximity to the edge 18 of the locating hole 14 when the part 12 is in the located position 16 .
- the part holding features 33 of the jaws 32 may be within 1 mm of the edge 18 of the locating hole 14 when the part 12 I in the located position 16 .
- the part 12 may be held by further expanding the jaws 32 of the expanding locating pin assembly 10 to apply the holding force (arrow HF) after the part 12 is in the located position 16 such that both the holding force (arrow HF) and the friction force (arrow FF) resulting from the holding force (arrow HF) holds the part 12 in the located position 16 .
- the jaws 32 of the locating pin 22 may be radially moveable from a minimum diameter radial position 36 to a maximum diameter radial position 38 .
- the jaws 32 of the locating pin 22 may be radially moveable to locate and hold parts 12 having locating holes 14 ranging from 6 mm in diameter at the minimum diameter radial position 36 to 20 mm in diameter at the maximum diameter radial position 38 .
- the jaws 32 of the locating pin 22 may be radially moveable to locate and hold parts 12 having locating holes 14 ranging from 20 mm in diameter at the minimum diameter radial position 36 to 40 mm in diameter at the maximum diameter radial position 38 .
- the jaws 32 of the locating pin 22 may be radially movable to locate and hold parts 12 having locating holes 14 of any other appropriate range of diameters, for example 16 mm to 32 mm or 6 mm to 40 mm.
- each jaw 32 may include a jaw positioning pin 40 .
- the actuating mechanism 24 may include a rotating plate 42 configured with a respective jaw positioning slot 44 extending both radially and circumferentially for each jaw positioning pin 40 .
- Each jaw positioning pin 40 may be connected to the respective jaw positioning slot 44 such that rotating the rotating plate 42 in a first radial direction (arrow R 1 ) increases the radial position 34 of the jaws 32 and applies the holding force (arrow HF) and rotating the rotating plate 42 in a second rotation direction (arrow R 2 ), opposite the first rotation direction (arrow R 1 ), decreases the radial position 34 of the jaws 32 and releases the holding force (arrow HF).
- the actuating mechanism 24 may include a crank arm 46 connected to the rotating plate 42 and a connecting rod 48 connected to the crank arm 46 and to the actuator 25 .
- the actuator 25 via the connecting rod 48 and the crank arm 46 , may cause the rotating plate 42 to rotate in the first rotation direction (arrow R 1 ) to increase the radial position 34 of the jaws 32 and to apply the holding force (arrow HF) and in the second rotation direction (arrow R 2 ), opposite the first rotation direction (arrow R 1 ), to decrease the radial position 34 of the jaws 32 and to release the holding force (arrow HF).
- the actuator 25 may be an electric servo motor 50 having an output shaft (not shown) attached to the rotating plate 42 .
- the electric servo motor 50 may cause the rotating plate 42 to rotate in the first rotation direction (arrow R 1 ) to increase the radial position 34 of the jaws 32 and to apply the holding force (arrow HF) and in the second rotation direction (arrow R 2 ), opposite the first rotation direction (arrow R 1 ), to decrease the radial position 34 of the jaws 32 and to release the holding force (arrow HF).
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Abstract
An expanding locating pin assembly configured to locate and hold a part includes a housing, a locating pin, an actuating mechanism, and a controller. The housing is configured with a plurality of radial jaw guides and a part rest face. The locating pin has a plurality of jaws connected to and radially movable in the radial jaw guides and extending past the part rest face. The actuating mechanism synchronously moves the jaws to a radial position and applies a holding force to the part. The controller controls the radial position and the holding force of the jaws. The part rest face of the housing and the jaws of the locating pin are configured to receive the part in a located position. The jaws of the locating pin are configured to hold the part in the located position via the holding force and a friction force resulting from the holding force.
Description
- This disclosure relates to an expanding locating pin with controlled holding force.
- A manufacturing system typically operates on parts, subassemblies, and/or assemblies that must be accurately located and held in place for manufacturing and assembly operations. For example, a sheet metal part, subassembly, or assembly may need to be accurately located and held in place to conduct assembly, welding, and inspection operations in the body shop of a vehicle assembly plant.
- Part locating fixtures are normally used for this purpose. Part locating fixtures typically include a plurality of fixed pins that are configured to fit into a plurality of locating holes in the part and one or more clamps that are configured hold the part in place. The locating holes may have various sizes and/or shapes. Part locating fixtures are generally useable for only one particular part size and/or shape and usually need to be modified or rebuilt to locate and hold a differently sized and/or shaped part. Multiple part locating fixtures are typically required for the wide variety of parts and the wide variety of assembly and manufacturing operations in a manufacturing plant.
- An expanding locating pin assembly and a flexible manufacturing system are provided herein. The expanding locating pin assembly is configured to locate a part with locating holes of various sizes. The expanding locating pin assembly includes a housing, a locating pin, an actuating mechanism, and a controller. The housing is configured with a plurality of radial jaw guides and a part rest face. The locating pin has a plurality of jaws. Each jaw is connected to and radially movable in one of the radial jaw guides and extends from the part rest face. The actuating mechanism is connected to the housing and the jaws and is configured to synchronously move the jaws to a radial position. The controller is connected to the actuating mechanism and is configured to control the radial position of the jaws. The part rest face of the housing and the jaws of the locating pin are configured to receive the part in a located position. The housing may be configured with three jaw guides, and the locating pin may have three jaws.
- A second embodiment of the expanding locating pin assembly is configured to locate a part with locating holes of various sizes and hold the part with a controlled holding force. The expanding locating pin assembly includes a housing, a locating pin, an actuating mechanism, and a controller. The housing is configured with a plurality of radial jaw guides and a part rest face. The locating pin has a plurality of jaws. Each jaw is connected to and radially movable in one of the radial jaw guides and extends from the part rest face. The actuating mechanism is connected to the housing and the jaws and is configured to synchronously move the jaws to a radial position and to apply the holding force to the part. The controller is connected to the actuating mechanism and is configured to control the radial position of the jaws and the holding force of the jaws on the part. The part rest face of the housing and the jaws of the locating pin are configured to receive the part in a located position. The jaws of the locating pin are configured to hold the part in the located position via the holding force and a friction force resulting from the holding force. The housing may be configured with three jaw guides, and the locating pin may have three jaws.
- The flexible manufacturing system is configured for manufacturing one or more of a part, a subassembly, and an assembly each having various configurations and locating holes of various sizes. The flexible manufacturing system includes an expanding locating pin assembly configured to locate and hold one of the part, the subassembly, and the assembly in a located position. The expanding locating pin assembly includes a housing, a locating pin, an actuating mechanism, and a controller. The housing is configured with a plurality of radial jaw guides and a part rest face. The locating pin has a plurality of jaws. Each jaw is connected to and radially movable in one of the radial jaw guides and extends from the part rest face. The actuating mechanism is connected to the housing and the jaws and is configured to synchronously move the jaws to a radial position and to apply the holding force to the one of the part, the subassembly, and the assembly. The controller is connected to the actuating mechanism and is configured to control the radial position of the jaws and the holding force of the jaws. The part rest face and the jaws of the locating pin are configured to receive the one of the part, the subassembly, and the assembly in the located position. The jaws of the locating pin are configured to hold the one of the part, the subassembly, and the assembly in the located position via the holding force and a friction force resulting from the holding force. The housing may be configured with three jaw guides, and the locating pin may have three jaws.
- The expanding locating pin assembly and the flexible manufacturing system enable parts, subassemblies, and/or assemblies having various configurations and locating holes of various sizes to be located and held in place for manufacturing and assembly operations. This disclosure applies to any machine or manufacture that locates any item, including but not limited to parts, subassemblies, assemblies, for any purpose. This disclosure applies to any manufacturing system, including but not limited to manufacturing systems for vehicles and other transportation products, industrial products, construction products, consumer products, and government products.
- The above features and advantages and other features and advantages of the present teachings are readily apparent from the following detailed description of the best modes for carrying out the present teachings when taken in connection with the accompanying drawings.
-
FIG. 1A is a schematic perspective illustration of an expanding locating pin assembly with a plurality of jaws at a minimum diameter radial position. -
FIG. 1B is a schematic perspective illustration of the expanding locating pin assembly ofFIG. 1A including a part that is located and held in a located position by the expanding locating pin assembly. -
FIG. 2 is a schematic side view of the expanding locating pin assembly ofFIG. 1A with the plurality of jaws at the minimum diameter radial position and including the part to be located and held. -
FIG. 3A is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly ofFIG. 1A , taken at line 3-3 ofFIG. 2 , with the plurality of jaws at the minimum diameter radial position. -
FIG. 3B is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly ofFIG. 1A , taken at line 3-3 ofFIG. 2 , with the plurality of jaws at a maximum diameter radial position. -
FIG. 4A is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly ofFIG. 1A , taken at line 4-4 ofFIG. 2 , with the plurality of jaws at the minimum diameter radial position. -
FIG. 4B is a schematic cross-sectional illustration, partially in elevation, of the expanding locating pin assembly ofFIG. 1A , taken at line 4-4 ofFIG. 2 , with the plurality of jaws at the maximum diameter radial position. -
FIG. 5 is a fragmentary schematic perspective view illustration of the expanding locating pin assembly ofFIG. 1A with an upper portion of a housing removed for clarity. -
FIG. 6 is schematic perspective view of an alternative embodiment of the expanding locating pin assembly ofFIG. 1A . - Referring to the drawings, wherein like reference numbers refer to like components throughout the views,
FIG. 1A-1B shows an expanding locatingpin assembly 10 for use in a flexible manufacturing system (not shown). The flexible manufacturing system is configured for manufacturing and/or assembling one or more of a part, subassembly, orassembly 12 each having various size and shape configurations and each configured with one or more locating holes 14 of various sizes. The locating holes 14 have anedge 18. The part, subassembly, orassembly 12 has a locatingsurface 15. Thepart 12 may need to be accurately located and held in place for manufacturing and assembly operations. For example, a sheet metal part, subassembly, orassembly 12 may need to be accurately located and held in place to conduct assembly, welding, and inspection operations in the body shop of a vehicle assembly plant. - The expanding locating
pin assembly 10 is configured to locate thepart 12 via the locatinghole 14 and the locatingsurface 15 in a locatedposition 16. The expanding locating pin assembly may also be configured to hold thepart 12 with a controlled holding force (arrow HF) in the locatedposition 16. Locating is defined herein as positioning thepart 12 in the locatedposition 16 in 3-dimensional space. Holding is defined herein as retaining thepart 12 in the locatedposition 16 via the holding force (arrow HF) acting normal to and on theedge 18 of the locatinghole 14 and/or via a friction force (arrow FF) resulting from the holding force (arrow HF) and acting parallel to and on theedge 18 of the locatinghole 14. Holding, as defined herein, does not include clamping. Clamping is defined herein as compressing thepart 12 between two surfaces with a clamping force (not shown) such that movement of thepart 12 is prevented by the clamping force and by the interference of the two surfaces with thepart 12. - The expanding locating
pin assembly 10 may be connected to an immovable structure (not shown), or to a moveable device (not shown), including but not limited to a robot, a conveyor, or a guided vehicle. There may be multiple expanding locatingpin assemblies 10 included in the flexible manufacturing system and/or in a particular manufacturing or assembly operation in the flexible manufacturing system. - The expanding locating
pin assembly 10 includes ahousing 20, a locatingpin 22, anactuating mechanism 24, and acontroller 26. Thehousing 20 is configured with a plurality of radial jaw guides 28 and apart rest face 30. - The locating
pin 22 has a plurality ofjaws 32. Eachjaw 32 is connected to and radially movable in one of the radial jaw guides 28 and extends out of thehousing 20 past therest face 30. The locatingpin 22 has a locating pin axis (axis LP) at its center of symmetry. Each of thejaws 32 has apart holding feature 33 at the radially outer edge of thejaw 32 that is farthest from the locating pin axis (axis LP). Thepart holding feature 33 of thejaws 32 may be a surface that is parallel to the locating pin axis (axis LP), as shown. Thepart holding feature 33 of thejaws 32 may be a segment of a cylindrical surface, as shown. Thepart holding feature 33 of thejaws 32 may be any other suitable feature for applying the holding force (arrow HF) perpendicular to the surface of theedge 18 of the locatinghole 14. - The
housing 20 may be configured with three radial jaw guides 28 and the locatingpin 22 may have threejaws 32 for locating thepart 12 when the locatinghole 14 is a round hole, as shown. Alternatively, thehousing 20 may be configured with two radial jaw guides 28 and the locatingpin 22 may have twojaws 32 for locating thepart 12 when the locatinghole 14 is a slot (not shown). - Continuing to refer to
FIGS. 1A-1B , theactuating mechanism 24 is connected to thehousing 20 and thejaws 32. Theactuating mechanism 24 is configured to synchronously move thejaws 32 to aradial position 34 defining a locatingpin circumference 31 and a locatingpin diameter 35 and to cause thejaws 32 to apply the holding force (arrow HF) normal to the surface of theedge 18 of the locatinghole 14 of thepart 12. Radial is defined herein as the direction perpendicular to the locating pin axis (axis LP). The actuating mechanism includes anactuator 25. Theactuator 25 may be one of a pneumatic actuator, a hydraulic actuator, and an electric servo motor. - The
controller 26 is connected to theactuating mechanism 24 and is configured to control the motion and theradial position 34 of thejaws 32 and to control the holding force (arrow HF) of thejaws 32 on theedge 18 of the locatinghole 14 of thepart 12. The magnitude of the holding force (arrow HF) may be controlled as appropriate depending on a variety of factors, including but not limited to the material type, the material thickness, the size, and the shape of thepart 12. - The
part 12 is located in the locatedposition 16 on thepart rest face 30 and thejaws 32 of the locatingpin 22. The locatingsurface 15 of thepart 12 is in contact with the part rest face 30 of thehousing 20 when thepart 12 is in the locatedposition 16. In addition, the part holding features 33 of thejaws 32 are in close proximity to theedge 18 of the locatinghole 14 when thepart 12 is in the locatedposition 16. For example, the part holding features 33 of thejaws 32 may be within 1 mm of theedge 18 of the locatinghole 14 when the part 12 I in the locatedposition 16. Thepart 12 may be held by further expanding thejaws 32 of the expanding locatingpin assembly 10 to apply the holding force (arrow HF) after thepart 12 is in the locatedposition 16 such that both the holding force (arrow HF) and the friction force (arrow FF) resulting from the holding force (arrow HF) holds thepart 12 in the locatedposition 16. - Referring now to
FIGS. 2-3B , thejaws 32 of the locatingpin 22 may be radially moveable from a minimum diameterradial position 36 to a maximumdiameter radial position 38. Thejaws 32 of the locatingpin 22 may be radially moveable to locate and holdparts 12 having locatingholes 14 ranging from 6 mm in diameter at the minimum diameterradial position 36 to 20 mm in diameter at the maximumdiameter radial position 38. Alternatively, thejaws 32 of the locatingpin 22 may be radially moveable to locate and holdparts 12 having locatingholes 14 ranging from 20 mm in diameter at the minimum diameterradial position 36 to 40 mm in diameter at the maximumdiameter radial position 38. Thejaws 32 of the locatingpin 22 may be radially movable to locate and holdparts 12 having locatingholes 14 of any other appropriate range of diameters, for example 16 mm to 32 mm or 6 mm to 40 mm. - Referring now to
FIGS. 4A-5 , eachjaw 32 may include ajaw positioning pin 40. Theactuating mechanism 24 may include arotating plate 42 configured with a respectivejaw positioning slot 44 extending both radially and circumferentially for eachjaw positioning pin 40. Eachjaw positioning pin 40 may be connected to the respectivejaw positioning slot 44 such that rotating therotating plate 42 in a first radial direction (arrow R1) increases theradial position 34 of thejaws 32 and applies the holding force (arrow HF) and rotating therotating plate 42 in a second rotation direction (arrow R2), opposite the first rotation direction (arrow R1), decreases theradial position 34 of thejaws 32 and releases the holding force (arrow HF). - The
actuating mechanism 24 may include acrank arm 46 connected to therotating plate 42 and a connectingrod 48 connected to thecrank arm 46 and to theactuator 25. Theactuator 25, via the connectingrod 48 and thecrank arm 46, may cause therotating plate 42 to rotate in the first rotation direction (arrow R1) to increase theradial position 34 of thejaws 32 and to apply the holding force (arrow HF) and in the second rotation direction (arrow R2), opposite the first rotation direction (arrow R1), to decrease theradial position 34 of thejaws 32 and to release the holding force (arrow HF). - Referring now to
FIG. 6 , theactuator 25 may be anelectric servo motor 50 having an output shaft (not shown) attached to therotating plate 42. Theelectric servo motor 50 may cause therotating plate 42 to rotate in the first rotation direction (arrow R1) to increase theradial position 34 of thejaws 32 and to apply the holding force (arrow HF) and in the second rotation direction (arrow R2), opposite the first rotation direction (arrow R1), to decrease theradial position 34 of thejaws 32 and to release the holding force (arrow HF). - While the best modes for carrying out the many aspects of the present teachings have been described in detail, those familiar with the art to which these teachings relate will recognize various alternative aspects for practicing the present teachings that are within the scope of the appended claims.
Claims (20)
1. An expanding locating pin assembly configured to locate a part with locating holes of various sizes, comprising:
a housing configured with a plurality of radial jaw guides and a part rest face;
a locating pin having a plurality of jaws, each connected to and radially movable in one of the radial jaw guides and extending past the part rest face;
an actuating mechanism connected to the housing and the jaws and configured to synchronously move the jaws to a radial position; and
a controller connected to the actuating mechanism and configured to control the radial position of the jaws;
wherein the part rest face and the jaws of the locating pin are configured to receive the part in a located position.
2. The expanding locating pin assembly of claim 1 , wherein the jaws of the locating pin are radially moveable to locate the part with locating holes ranging from 6 mm to 20 mm in diameter.
3. The expanding locating pin assembly of claim 1 , wherein the jaws of the locating pin are radially moveable to locate the part with locating holes ranging from 20 mm to 40 mm in diameter.
4. The expanding locating pin assembly of claim 1 , wherein the housing is configured with three jaw guides; and
wherein the locating pin has three jaws.
5. The expanding locating pin assembly of claim 1 , wherein each jaw includes a jaw positioning pin;
wherein the actuating mechanism includes a rotating plate configured with a respective jaw positioning slot extending both radially and circumferentially for each jaw positioning pin; and
wherein each jaw positioning pin is connected to the respective jaw positioning slot such that rotating the rotating plate moves the jaws of the locating pin in the radial jaw guides to the radial position.
6. The expanding locating pin assembly of claim 1 , wherein the actuating mechanism includes a crank arm and a connecting rod.
7. The expanding locating pin assembly of claim 1 , wherein the actuating mechanism includes a pneumatic actuator.
8. The expanding locating pin assembly of claim 1 , wherein the actuating mechanism includes an electric servo motor.
9. An expanding locating pin assembly configured to locate a part with locating holes of various sizes and to hold the part with a controlled holding force, comprising:
a housing configured with a plurality of radial jaw guides and a part rest face;
a locating pin having a plurality of jaws each connected to and radially movable in one of the radial jaw guides and extending past the part rest face;
an actuating mechanism connected to the housing and the jaws and configured to synchronously move the jaws to a radial position and to apply the holding force to the part; and
a controller connected to the actuating mechanism and configured to control the radial position of the jaws and the holding force;
wherein the part rest face and the jaws of the locating pin are configured to receive the part in a located position; and
wherein the jaws of the locating pin are configured to hold the part in the located position via the holding force and a friction force resulting from the holding force.
10. The expanding locating pin assembly of claim 9 , wherein the jaws of the locating pin are radially moveable to locate and hold the part having locating holes ranging from 6 mm to 20 mm in diameter.
11. The expanding locating pin assembly of claim 9 , wherein the jaws of the locating pin are radially moveable to locate and hold the part having locating holes ranging from 20 mm to 40 mm in diameter.
12. The expanding locating pin assembly of claim 9 , wherein the housing is configured with three jaw guides; and
wherein the locating pin has three jaws.
13. The expanding locating pin assembly of claim 9 , wherein each jaw includes a jaw positioning pin;
wherein the actuating mechanism includes a rotating plate configured with a respective jaw positioning slot extending both radially and circumferentially for each jaw positioning pin; and
wherein each jaw positioning pin is connected to the respective jaw positioning slot such that rotating the rotating plate moves the jaws of the locating pin in the radial jaw guides to the radial position and applies the holding force.
14. The expanding locating pin assembly of claim 9 , wherein the actuating mechanism includes a crank arm and a connecting rod.
15. The expanding locating pin assembly of claim 9 , wherein the actuating mechanism includes a pneumatic actuator.
16. The expanding locating pin assembly of claim 9 , wherein the actuating mechanism includes an electric servo motor.
17. The expanding locating pin assembly of claim 9 , wherein the locating pin has a locating pin axis;
wherein the jaws of the locating pin are each configured with and a part holding feature; and
wherein the part holding feature of the jaws is a surface that is parallel to the locating pin axis.
18. The expanding locating pin assembly of claim 9 , wherein the part holding feature of the jaws is a segment of a cylindrical surface.
19. A flexible manufacturing system configured for manufacturing one or more of a part, a subassembly, and an assembly each having various configurations and locating holes of various sizes, comprising:
an expanding locating pin assembly configured to locate and hold one of the part, the subassembly, and the assembly in a located position, including:
a housing configured with a plurality of radial jaw guides and a part rest face;
a locating pin having a plurality of jaws each connected to and radially movable in one of the radial jaw guides and extending past the part rest face;
an actuating mechanism connected to the housing and the jaws and configured to synchronously move the jaws to a radial position and to apply the holding force to the one of the part, the subassembly, and the assembly; and
a controller connected to the actuating mechanism and configured to control the radial position of the jaws and the holding force on the one of the part, the subassembly, and the assembly;
wherein the part rest face and the jaws of the locating pin are configured to receive the one of the part, the subassembly, and the assembly in the located position; and
wherein the jaws of the locating pin are configured to hold the one of the part, the subassembly, and the assembly in the located position via the holding force and a friction force resulting from the holding force.
20. The flexible manufacturing system of claim 19 , wherein the housing is configured with three jaw guides; and
wherein the locating pin has three jaws.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US14/830,287 US10081063B2 (en) | 2015-08-19 | 2015-08-19 | Expanding locating pin with controlled holding force |
CN201610642547.0A CN106466818B (en) | 2015-08-19 | 2016-08-08 | Expansion positioning pin with controlled retentivity |
DE102016114769.9A DE102016114769A1 (en) | 2015-08-19 | 2016-08-09 | SPREIZFIXING PIN WITH REGULATED HOLDING POWER |
Applications Claiming Priority (1)
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US14/830,287 US10081063B2 (en) | 2015-08-19 | 2015-08-19 | Expanding locating pin with controlled holding force |
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US20170050245A1 true US20170050245A1 (en) | 2017-02-23 |
US10081063B2 US10081063B2 (en) | 2018-09-25 |
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US14/830,287 Active 2036-08-20 US10081063B2 (en) | 2015-08-19 | 2015-08-19 | Expanding locating pin with controlled holding force |
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US (1) | US10081063B2 (en) |
CN (1) | CN106466818B (en) |
DE (1) | DE102016114769A1 (en) |
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US20170050246A1 (en) * | 2015-08-19 | 2017-02-23 | GM Global Technology Operations LLC | Expanding locating and clamping pin |
CN114194452A (en) * | 2022-02-17 | 2022-03-18 | 四川永星电子有限公司 | Automatic detection mechanism for S parameter of radio frequency chip type load band |
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Also Published As
Publication number | Publication date |
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CN106466818B (en) | 2019-02-19 |
DE102016114769A1 (en) | 2017-02-23 |
US10081063B2 (en) | 2018-09-25 |
CN106466818A (en) | 2017-03-01 |
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